There are screws holding the top and bottom fairing together. You need to loosen them and they will slide in and then tighten everything back up. It has been a long time since I did mine and don't recall the intimate details. But that is the nuts and bolts of it. If I recall correctly, it is just two small bolts on each side.

they mount right under the fairing bottom. the 2 nuts are on the bottom side of the fairing and mount.
heres a picture of a fairing with my finger pointing to were the plastic cover trim goes.
Now my fairing is standing up so the fairing is up by my hand and the reflector is at bottom on picture